Did you hear loud explosions over the weekend?

RICHLAND, Wash.—If you heard loud explosions over the weekend, it was because two buildings and a tall stack were blown to pieces.

It's all part of the Hanford cleanup. Three structures were explosively demolished early Saturday morning just north of Richland by a Washington Closure Hanford Subcontractor.

Workers have been preparing the building for months by weakening the foundation. These buildings don't have any radioactive material. But they were still imploded, meaning they collapsed inward, to reduce dust and other materials from spreading.

"It was exciting to see an immediate result of something. I mean building demolitions can take months or years to get them ready to demolish," says Todd Nelson, Washington Closure Spokesman.

Hanford workers are looking to demolish more buildings in the near future. One of which is a structure that does have radioactive materials. And they've been preparing it for the past four years.